With his planes, helicopters, and other fuel-hungry pets, Dean Kamen admits that he takes a lot out of the world. This just means that, in keeping with his immigrant grandfather's advice, he has to put more back in. In the second part of our

Having given Global Water Challenge a Best of Green award earlier this year for their innovative work on the issues of drinking water and sanitation, it goes without saying that TreeHugger is a fan of their work.

Stand at the edge of a reservoir, river, or ocean and it's hard to imagine that the planet could ever run out of water; even just a day at the beach makes your one small shower a day seem like less of a threat. But with

Directed by David Valero for the Spanish eco-short-films festival La Luciernaga fundida, this video shows how a grandmother and grandson desalinate seawater at home.

Here's a frequent question asked by people wanting to create positive sustainable changes in the world: Is it more effective to work as a change agent from inside the current system or is it better to

All over the world, inspired, creative, (and often obsessed) entrepreneurs are tightening bolts and swirling beakers, inventing the next generation of green technology. Andrew Heintzman is a venture capitalist with the aim of finding and funding these

This simple, innovative solar still purifies water without electricity or filters.

These low-impact, solar-powered desalination units could be a potential boon to water-scarce coastal communities, disaster-prone areas, as well as local marine life.

Using solar stills to purify water isn't a new idea, but it's an effective one. And now new efforts are underway to use this old technology to help green the desert.

A new desalination technology company is looking to help clean up and recover some of the trillion gallons of salty wastewater from the oil and gas industry.

A new water treatment system could save billions of gallons of water each year by recovering almost all of the waste water at bottling plants and water treatment facilities.

The UAE's clean tech giant plans to have a commerical-scale plant by 2020.

This novel wave energy technology can deliver large volumes of high pressure water ashore for desalination or power production (or both).

By combining solar PV, solar thermal, and a heat exchanger, Desolenator has developed a low-cost portable water purifier and desalination device powered by renewable energy.

This system could produce 3,500 gallons of clean water per day, at half the cost of current desalination methods, using just the motion of the waves to power the Reverse Osmosis process.

The latest episode of Fully Charged appears to come to us from the future. Or, maybe just Australia...

A proposed office uses "climatic architecture" to cool the building by making it into a natural wind tunnel.

Who says wheat-free can't mean indulgent? Best-selling cookbook author Karen Morgan offers up irresistible (and also vegetarian) main courses, snacks, and desserts.

When an Iowa State professor of mechanical engineering followed his hunch about spider webs, it paid off: he proved biological materials can rival metals in conducting heat.

Google's St. Ghislain, Belgium data center is its most efficient thanks in part to letting the server areas run at temperatures up to 95 degrees.

The iPod of thermostats gets updated with new energy saving features and increased functionality in its mobile apps.

This easy DIY project will save you money and reduce energy consumption by making less work for your air conditioner.

What if the Google Street View car took thermal energy scans of all the country's buildings and then built a database of building energy efficiency information? That's the concept behind startup company Essess's approach to home energy audits.

As the mercury rises, staying cool becomes a real challenge. Try making this gorgeous desk fan to keep your energy costs down.

With the first heatwave of the summer behind us, let's start thinking about how we can adapt ourselves to the heat, rather than just complaining about it or pushing it away via air conditioning.

An ice cream cart uses solar panels to power its refrigeration unit.

Labor Day once meant the temperature fell -- but for much of the U.S., that's not looking likely for a few more weeks. Don't let the end-of-summer's unprecedented heat get you down!

At the tech company's New Mexico data center, it found that oil-submerged servers require far less energy for cooling and actually perform better.

A new material could be applied to roofs that would soak up rain and then "sweat" out the moisture when temperatures are high to cool down buildings without electricity.

The smart thermostat is now compatible with most home heating and cooling systems in the U.S. and Canada.

A unique solar panel has been designed at Stanford that cools buildings by reflecting sunlight and radiating thermal energy out into space.

Using an age-old method to cool the air, this terracotta "cold pot" could be an energy-efficient and low-maintenance alternative to conventional air conditioners.

The thermostat add-on lets consumers set a limit to what they want to spend on cooling and heating and then it controls the temperature to keep energy use in check.

Keeping our thermostats programmed at year-round comfortable temperatures could be affecting our health.

The new technology would allow precise control over the transparency of windows and how much light is let in.

The smart thermostat will help people save even more money and help utilities curb peak demand loads.

From making homemade pasta and bread crumbs to cauliflower rice and so much more, the humble box grater is a genius, multi-talented workhorse.

It lets them be creative with their cooking and the kind of spaces they set up in.

The technology uses radiative sky cooling to help cool buildings without electricity.

This could keep people from overheating in their wearable electronic outfits or simply in the heat of the ever-warming days

This might be one of the smartest ways to use a smart thermostat.

The smartest features of a smart thermostat may actually be the pretty simple.

The dual source heat pump uses either the ground or the air as a heat source.

This ancient method is simple and cheap.

Octogenarian couple united by a love of entomology

The Center for Food Safety's recently launched network is a bid to preserve global plant biodiversity and work toward food security around the globe.

From brilliant pink lady katydids to devil-faced orchids, this year's list of new-to-science wonders proves Mother Nature is full of surprises.

An event on Lake Tahoe promises "world class minds, radical innovation and kickass rock 'n roll". And solutions to the biodiversity crisis, too.

The secret to a diet that makes the microbes in your gut healthy, for fighting obesity and disease

One-third of emissions reductions needed for 2 degree target could be achieved with better land management.